The funny thing is, a cornered Trump will think this way--that he can somehow squelch the criminal investigations into his administration by using the FBI to, say, threaten his predecessor. He is completely clueless.

You're right, I was mistaken. I didn't realize the role citizenship played in the Polanski case. I've read it's notoriously difficult to extradite from there in general. Would be interesting to see if he leaves if Le Pen wins.